Finding the Fourth Proportional to 20,737.86, 31,089.60 and 8,081.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,737.86 : 31,089.60 = 8,081.34 : x
2. Step 2: Convert to fraction form
   20,737.86/31,089.60 = 8,081.34/x
3. Step 3: Cross multiply
   20,737.86x = 31,089.60 × 8,081.34
4. Step 4: Simplify right side
   20,737.86x = 251,245,628.06
5. Step 5: Solve for x
   x = 251,245,628.06/20,737.86
6. Step 6: Final answer
   x = 12,115.31